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2 Sheets-Sheet 2. P. R. DE FAUOHEUX DHUMY.

(No Model.)

INGANDESGENT ELECTRIC LAMP.

N. PETERS. Pholo-lilhognlplur. Washington, D.C.

I fig: Q2

N 5 I'm 1 I UNITED STATES PATENT OFFICE.

PAUL RAOUL DE FAUCHEUX- DHUMY, OF OARLETON MANSIONS, CLAPHAM RISE, COUNTY OF SURREY, ENGLAND.

VINCANDESCENT ELECTRIC LAMP.

SPECIFICATION forming part of Letters latent No. 282,861, dated August 7, 1883.

7 Application filed April 19,1883. (No model.) Patented in England October 14,1ss2,1 r0.4,es3.

. in Electric Lamps, (for which I have received Letters Patent in Great Britain, No. 4,883, dated October 14, 1882,) of which the follow ing is a specification. 1

The invention has for its object improvements in that class of electric lamps known as incandescent lamps, and relates to those devices in which means are employed whereby the destruction of the metallic carbon or other filament or other substance composing the burner is delayed or prevented for a considerable period, and the necessity of employing costly and troublesome machinery and processes forproducing a vacuum in the glass globe or bulb is obviated, while facility is afforded for cleansing and renewing the variousparts of the lamp without the necessity for de stroying any part thereof.

In order that my said invention may be clearly understood and readily carried into of feet, I will proceed, aided by the accompanying drawings, fully to describe the same.

In the drawings, Figures 1 and 2 are sectional elevations of electriclamps, showing two modifications of my invention. Fig. 3 is a vertical section, and Fig. 4 is a plan, of the lower part of the lamp shown at Fig. 2 and Fig. 5 is a vertical section, and Fig. 6 is a plan, of the lower part or fitting of the glass globe or bulb shown in Fig. 2. Figs. 3, 4, 5, and 6 are drawn to a larger scale than Fig. 2. 1

Like parts are marked with similar letters of reference in all the figures.

a is a glass globe or bulb surrounding the burner. This globe or bulb a is formed with an aperture at both top and bottom thereof. The bottom a is passed over a cylindrical insulator, I), through which the wires 0 0, con-.

nected with the burner, are passed. The glass globe or bulb a is provided at its lower end, a, with a metallic ring or socket, d, for facilitat; ing its connection and disconnection with its support I). I p

In Fig. 1 the bottom of the insulating support b is provided with a contact-ring, e, in connection with the wire 0, and said ring 6, by

a spring contact-piece, e, is capable of connection and disconnection with the wire 0 while a contact-ring, e, is fixed to the ebonite 5 5 or other insulating-support, f, and the wire 0 is capable of connection and disconnection with the ring 6 and consequently with the wire 0 through a spring contact-piece, 0

In Fig. 1 the ring or socket d is shown provided with a screw-thread to enable it to be screwed into its support b. In Figs. 2to 6 the ring or socket d is shown cylindrical, and to fit tightly into its support 12 without screwing, and in the latter case the 6 5 wires 0' c are shown connected at their lower ends to terminals 0" 0 with which the wires 0 canbe connected or disconnected by binding-screws.

Into or through the center of the eylindrical insulator b is passed the open upper end of a glass or other vessel, 9, which is capable of being raised and lowered and retained in any desired position by simple friction with the socket-sides of the insulator, as shown at Fig. 1; or it is secured to an externallyserewthreaded tube, 9, adjustable by screwing in an internally screw -threaded tube, 9, as shown at Figs. 2, 3, and 4. This vessel 9 is supplied with any suitable hydrocarbon fluid or other material capable of giving off carbon or hydrocarbon. A wire strip, stick, or, tube,

71, from theburner is passed down into the hydrocarbon fluid or other substance in the vessel 9, and is supported in the bottom of such vessel, and a wick, h, dipping into such fluid, (when the latter is employed) is carried a short distance up the said wire strip, stick, or tube"h.

The aperture at the upper part, c of the 0 glass globe to is provided with a valve, i, or other closing means capable of being operated from the exterior. I11 the arrangement represented at Fig. 1 it is shown provided with a screw 4" by which it can be caused to 0 on or 7 7 p close the aperture in the upper part, cf, of the glass globe a,- but in the arrangement shown at Fig. 2 a valve, 47, is shown to rest in its seat in a cap, 6', by the force ofgravity, while it is raised from its seat by hand or by any excessive pressure in the interior of the glass globe a. If desired, however, the said valve i may be provided with springs i to press it to its seat.

The burner is constructed of wire filament or sticks or tubes 0 c of metal or of other suitable material, carried upward from the wires 0 0' on each side of the globe or bulb a, and connected at their upper ends by a crosspiece, a A small globe, c, of carbon mixed with graphite or other like material, is placed at the upper end of each vertical portion a 0 of the filament wire, stick, or tube, and such.

globes c" are formed with central holes to fit the parts 0 0 so that they can rest on the latter by gravity, and as the upper ends of the parts 0 0" become consumed the globes follow such parts a c and remain supported thereby; and in order to increase the life of the burner, other wires, filaments, sticks, or tubes, 0", are connected to the vertical wires, filaments, sticks, or tubes below the carbon globes c", and to the horizontal part c of the filament wire, stick, or tube, above which they are united and terminate in a third carbon globe, 0. Thus whenever the horizontal part c of the wire, filament, stick, or tube becomes severed, and the current thereby prevented passing through the same, these latter wires, filaments, sticks, or tubes '0 and their carbon globe al continue to receive the current, and the lamp consequently continues to work.

The wire or strip, stick, or tube h, dipping into the hydrocarbon fluid or other material in the vessel 9, will, when the lamp is in use, convey heat to such fluid or material and cause vapor to be given ofi therefrom. This vapor will (the top aperture in the globe or bulb a being open) first drive out the atmospheric air from the globe or bulb a, after which the said top' aperture is closed. Then, in the continued working of the lamp, the carbonaceous vapor will continuously deposit a thin layer of carbon on the incandescent filament, wire, stick, or tube 0 0 0 0 and on the carbon globes c c, and thereby for a long period prevent the destructionthereof, while the hydrocarbon vapor in the globe or bulb to will also assist in such operation.

By raising and lowering the vessel 9, I obtain facility of adjustment, whereby I can, as may be required, adjust the position of the parts 0 0 in relation to the parts 0 o c of the burner when the burner is first about to be used, and afterward to maintain the" correct relation of such parts as the parts 0 0 become shorter by combustion at their upper ends. The parts 0, c and c are so formed or sprung toward each other as to enable the part 0" to to be raised and lowered, and yet to retain ably provided with socketsj, as shown, to receive the vertical portions 0 c of the burner, thereby enabling the latter to be readily renewed when required.

The metallic wire or filament or other material forming the burner may be still further protected by applying thereto a coating composed of lime, carbon, plumbago, or graphite, separately, or of two or more of them combined in about equal proportions.

Having thus described the nature of my said invention and the manner in which I carry the same into effect, I would have it understood that what I claim is 1. The combination, in an electric lamp, of the vessel insulator b supporting the vessel, a suitable globe fitting around the insulator, a burner within the globe, and a device, 71, connecting the burner with the interior of 85 the vessel, as set forth.

2. In an electric lamp, the combination of a vessel, 9, insulator supporting the vessel, a globe having an opening at bottom tofit over the insulator and an opening at top to permit the atmospheric air to escape, valve closing said top opening, a burner within the globe, and a device, h, connecting the interior of the vessel with the burner, as set forth.

3. I11 an electric lamp, the combination of a vessel, insulator supporting the vessel, a

, globe having an opening at top, valve i closing said top, screw '5 for adjusting the valve, a burner within the globe, and a device, h, connecting the interior of the vessel with the burner, as set forth.

4.. In an electric lamp, the combination of a vessel, 9, for containing hydrocarbon, and adjustable in its support, a burner having an adjustable portion, and a device, h, resting on the bottom of the vessel, connected tothe adjustable portion of the burner to support the latter, and adjustable with the vessel, as set forth.

5. In an electric lamp, the combination of vessel 9, burner, and device h, having a wick, h, dipping into the vessel, as set forth.

6. In an electric lamp, the combination of insulator '1), socket d, screw-threaded insulator, and globe a, having opening fitting over the insulator and seated in the socket, as set forth.

7. In an electric lamp, the combination, with insulator carrying wires 0 c, of the burnerlformed of wire filaments c and 0, crosspiece 0, and globes c a", of carbon or analogous material, fitted to the cross-piece, and formed withcentral holes to fit the filaments to adapt the globes to descend by gravity as the filaments are consumed, as set forth.

8. In an electric lamp, the burner consisting of vertical filaments c" and c", cross-piece c globes 0, connecting the cross-piece and filaments, supplemental globe a, and supplemental filaments 0 0 connecting the supple- 13o mental globe, cross-piece, and vertical filaments, as set forth.

9. In an electric lamp, the combination of 11. In an electric lainp, the combination,- the burner consisting of vertical filaments c with suitable connecting-Wires, of the insulaand c cross-piece 0 small globes c c", suptor b, carrying Wires 0 e, contact-ring e, and plemental filaments 0 0 and supplemental spring contact-piece e, and the insulating- I 5 5 small globe c, the vessel 9, and device h, consupport f, having contact-ring 6*, spring conneeting the supplemental small globe to the tact-piece e and wires 0 c, as set forth.

interior of the vessel, as set forth. P. DHUMY.

10. In an electric lamp, the means for con- Witnesses: nccting the vessel 9 to the insulator consist. FREDK. HARRIS, IO ing of externallyscrew-threaded tube g and O:M. \VHITE,

internallyscrew-threaded tube y, as set forth. Both of 23 A outhmnpton Building s, London. 7 

